37 Food-Related Allergies and Intolerances. Have you ever overheard someone ordering their food while asking very specific questions about exact ingredients and cooking processes? Well, this person is most likely avoiding a food allergy or intolerance.I witness this quite often when I go out to eat because my dad has celiac disease (an intolerance to gluten). He has to avoid anything with gluten or that may have come into contact with gluten—don’t worry, I’ll explain what gluten is when we get to it in the slideshow.According to the Food Allergy Research and Education organization, an allergy relates to the immune system and can lead to a life-threatening situation when someone has a reaction. An intolerance is when your body has problems digesting a certain food.The simplest way to visualize this is to compare someone with a nut allergy to a person who is lactose intolerant. There are some people with nut allergies that can’t even be in the same room with nuts because even the air around the nuts can cause them to go into shock. Then, there are the people who are lactose intolerant and will only run into issues if they consume it.  I bet you know people who have some of these allergies but have no idea what the science is behind it. Let’s get to learning. Here are 37 food-related allergies and intolerances.If you think you have any food-related allergies or intolerances contact your doctor to take tests and develop a plan, which will work for you.